Privacy policy
The tools on this site run in your browser. The numbers, dates and grids you type are not sent to us.
What is stored on your device
If you use the theme button, the site saves your choice of light or dark theme in your browser’s local storage under the name “theme”. It stays on your device and is never sent to us. You can remove it by clearing site data in your browser. If storage is blocked, the site still works and simply forgets the choice.
What the tools do with your input
The generator, solver, puzzle, worksheet maker and any other calculator process what you enter inside the page. Puzzle and sheet numbers are only used to repeat the same puzzle. Nothing you enter is saved or uploaded.
Servers and third parties
Like any website, the host that serves the pages may keep ordinary server logs, such as the page requested and the network address. This site does not currently load analytics or advertising scripts. If analytics or advertising are added, this page will be updated to name the providers, say which cookies they set and link to opt-out options.
Contact
Questions about this policy can go through the contact page. See also the about page, the terms of use and the home page.